Monolithic Power Systems Inc. MP6510DM-LF

Overview

MP6510DM-LF from Monolithic Power Systems is a single-phase brushless DC motor driver IC with integrated high-side (370 mΩ) and low-side (230 mΩ) MOSFETs, operating from 4.5V to 16V input and delivering up to 1.2A continuous output current. It implements Hall-sensor-based commutation, supports speed control via analog voltage or PWM on VTH, and integrates locked-rotor protection, thermal shutdown, input over-voltage protection (20V threshold), and 1.2V Hall bias regulation - deployed in CPU fan control for servers and desktops.

For engineers reviewing the MP6510DM-LF datasheet, MP6510DM-LF pinout, MP6510DM-LF application, or MP6510DM-LF equivalent, key selection criteria include its TSSOP16 package compatibility, Hall-input sensitivity down to 3mV differential, programmable minimum speed via RMI, FG/ RD open-collector status outputs, and dual-current-limit architecture (Hall-proportional + fixed 2.5A peak).

Technical Context

The MP6510DM-LF uses a Hall-sensor feedback loop to synchronize MOSFET switching across two drive paths (OUT1/OUT2), with commutation logic governed by amplified Hall differential inputs (IN+/IN−). Its oscillator frequency (26.4–35.6 kHz) is set externally via COSC capacitor, while CT pin controls locked-rotor recovery timing through charge/discharge current sources (ICT1 = 1.1–2.85 μA; ICT2 = 0.08–0.25 μA).

Speed regulation operates in four distinct modes-Minimum Speed, Variable Speed, Full-Speed, and Locked-Rotor Protection-determined by comparisons among VTH, RMI, and COSC ramp voltage. The device embeds dual protection layers: input OVP triggers HS-FET shutdown at 20V with 1.7V hysteresis, and thermal shutdown activates at ~175°C with automatic recovery at ~155°C.

Key Specifications

Pinout & Package

MP6510DM-LF is housed in a thermally enhanced 16-pin TSSOP package (5.0 mm × 6.4 mm), with exposed thermal pad connected to P-GND for improved heat dissipation. Pin numbering follows JEDEC MO-153 AB standard.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-phase BLDC motor driver applications.

Compared with MC33035 and DRV10970, MP6510DM-LF delivers optimal integration for cost-sensitive, single-phase fan applications - combining Hall bias, OVP, locked-rotor recovery, and analog/PWM speed control in one TSSOP16 package without requiring external FETs or configuration firmware.

Availability

MP6510DM-LF is available at Aetrix Electronics and suitable for CPU fan control, server chassis cooling, and industrial brushless fan applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP6510DM-LF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with expertise in DC/DC converters, motor drivers, and LED controllers since 1997.

The MP6510 belongs to MPS's integrated BLDC motor driver product line, designed specifically for compact, reliable, and feature-rich cooling solutions in computing and industrial equipment - emphasizing Hall-based commutation, protection autonomy, and thermal robustness.

FAQ

What Hall sensor types are compatible with MP6510DM-LF?

The MP6510DM-LF supports bipolar latching Hall-effect sensors powered by its integrated 1.2V HB output. It accepts differential input sensitivity down to 3mV (IN+ − IN−), making it compatible with common 3-wire Hall ICs like Allegro A3291 or Melexis US5881. Unipolar or non-latching sensors are not supported due to required commutation phase detection.

How does the locked-rotor protection recover automatically?

Upon detecting no Hall transition for a time defined by CT capacitor and ICT1 current, the MP6510DM-LF disables PWM output and places RD in high-impedance state. ICT2 then discharges CT until voltage falls below VCTL (~1.73V), triggering automatic retry - repeating this cycle without external intervention until rotation resumes.

Can MP6510DM-LF drive motors requiring >1.2A continuous current?

No - its absolute maximum continuous output current is 1.2A at TA = 25°C with proper PCB copper area and thermal pad connection. Exceeding this risks thermal shutdown or permanent damage. For higher current, consider multi-phase alternatives like MP6530 or discrete half-bridge solutions with external FETs rated for the target load.

What is the purpose of separating P-GND and S-GND pins?

P-GND carries high di/dt motor return current and must be routed with low inductance to the thermal pad. S-GND serves as quiet reference for Hall inputs, VREF, and internal comparators. Separating them prevents noise coupling from power switching into sensitive analog circuits - essential for stable commutation and accurate current limiting.

Does MP6510DM-LF support PWM speed control on the VTH pin?

Yes - the VTH pin accepts either DC voltage (0–6V) or PWM signal (up to 30 kHz) to control motor speed. Internal filtering ensures stable operation with typical microcontroller PWM outputs; no external RC filter is required unless EMI mitigation is needed in noisy environments.

Is the exposed thermal pad electrically connected internally?

Yes - the exposed thermal pad is internally connected to P-GND and must be soldered to a large copper pour tied to P-GND. This connection is mandatory for both thermal performance (θJA = 90°C/W) and electrical stability, as it forms part of the main power return path for motor current.

What happens if the RMI pin is left floating?

Leaving RMI unconnected causes the device to default to full-speed mode - as RMI voltage drops below VTH, the driver bypasses minimum speed clamping and runs at 100% duty cycle. To avoid unintended full-speed operation, tie RMI to VTH (for disabled min-speed) or to a defined voltage divider for intentional minimum RPM setting.